Int32MulWithOverflow on arm64 uses a cmp to set flags rather than
the multiply instruction itself, thus we can use a left shift when
the multiplication is by a power of two.

This provides 0.15% for Speedometer2 on a Neoverse-N1 machine,
with React being improved by 0.45%.

Change-Id: Ic8db42ecc7cb14cf1ac7bbbeab0e9d8359104351
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3829472
Commit-Queue: George Wort <george.wort@arm.com>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82499}